S-8521E18MC-BLDT2U

Overview

The S-8521E18MC-BLDT2U is a switching controller from the ABLIC S-8520/8521 series, designed for step-down (buck) DC-DC converter applications. It operates with a fixed switching frequency of 180 kHz and supports an input voltage range of 2.5V to 16V. The device features a single positive output configuration and includes an enable control function. Packaged in a compact SOT-23-5 (SC-74A) surface-mount case, it is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated step-down switching controller topology for efficient voltage conversion
• Fixed 180 kHz switching frequency for optimized external component sizing
• Enable pin functionality for power management and system control

Applications

• Battery-powered portable electronic devices requiring buck regulation
• General-purpose DC-DC step-down power supply circuits
• Embedded systems utilizing low-voltage logic supplies

Procurement Notes

Verify the exact suffix against official ABLIC documentation, as variations such as 'BLD' versus 'BLDT' may indicate specific packaging or tape-and-reel configurations. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability for this specific part number may vary by region and production cycle.

Selection Notes

Select this component when a fixed-frequency buck controller is required for inputs up to 16V. Ensure the application design accommodates the 180 kHz switching frequency and that the thermal performance meets the -40°C to +85°C operating range requirements. Verify that the SOT-23-5 package footprint aligns with the PCB layout constraints.

Part Context

This part belongs to the S-8520/8521 family of switching controllers manufactured by ABLIC Inc. These ICs are categorized under PMIC - Power Management ICs and are specifically engineered for step-down topologies. The series provides a cost-effective solution for managing power distribution in compact electronic designs.

Replacement Considerations

Publicly confirmed substitute part numbers for this specific model were not identified in the provided source material. Cross-reference with other members of the S-8520/8521 series only if electrical parameters and pinouts are explicitly verified as compatible.